I really don't get why it has to be such a fog. I see no way out of it.
Pardon the pun, but I think it's just that a different language is such a foreign subject. And, I know for me, the biggest problem was that I didn't really know English that well, so applying the concepts of grammar was a struggle from the start. Unlike many other things we learn, I think languages (especially the the first one from what I hear and others have indicated here) takes a huge time investment before you feel like you're making any progress. I suppose there are a few other subjects like that, but for most stuff, you get at least some gratification right from the start.
I think the work you put in now will pay off though. At least for me, the seminary courses moved REALLY fast. I was learning, just not nearly as fast as I needed to to keep up, especially with all the other coursework. Any base you can build before that will be of great help, IMO. I ended up only doing a semester of Hebrew and stopping Greek after a few weeks, as I'd met the language requirements for my degree. But, I really do want to eventually learn them, so I'm looking at getting back into them, just at my own pace this time.
I hope the fog start to clear for you soon.